1. Puberty;Marshall,1978
2. Aktivatorterapi;Ahlgren,1980
3. Timing of interceptive orthodontic measures based on stages of maturation;Björk;Trans. Eur. Orthod. Soc.,1972
4. Current orthodontic concepts and techniques;Graber,1969
5. Physiological indicators in orthodontic diagnosis and treatment planning;Grave;Aust. Orthod. J.,1978